Grill for a box fan



FIG. 1 is a right side front perspective view of a grill for a box fanshowing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevation view thereof, the opposite side being amirror image of that shown;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear elevation view thereof.

The broken line showing of environmental structure in FIGS. 1, 2 and 5is for illustrative purposes only and forms no part of the claimeddesign.

The ornamental design for a grill for a box fan, as shown and described.